# Cursor not found error during Percona Backup

**URL:** <https://forums.percona.com/t/cursor-not-found-error-during-percona-backup/14854>\
**Category:** Percona Backup for MongoDB\
**Created:** [March 23, 2022, 9:27am UTC](https://forums.percona.com/t/cursor-not-found-error-during-percona-backup/14854 "2022-03-23T09:27:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jonathan\_Barbosa](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/jonathan_barbosa/32/5836_2.png) [@Jonathan\_Barbosa](https://forums.percona.com/u/Jonathan_Barbosa)\
**Post date:** [March 23, 2022, 9:27am UTC](https://forums.percona.com/t/cursor-not-found-error-during-percona-backup/14854/1 "2022-03-23T09:27:08Z")

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Percona Backup is failing with the following error. We noticed that is happening during backup of large collections.

MongoDB version is 3.6.

# [percona@VBNMDB502LIV scripts]$ pbm status Cluster:

rs0:

- rs0/VBNMDB501LIV.uat.pontoslivelo.com.br:27017: pbm-agent v1.6.1 OK
- rs0/VBNMDB502LIV.uat.pontoslivelo.com.br:27017: pbm-agent v1.6.1 OK
- rs0/VBNMDB503LIV.uat.pontoslivelo.com.br:27017: pbm-agent v1.6.1 OK

# PITR incremental backup:

Status [ON]

# Currently running:

(none)

# Backups:

FS /backup\_mongo\_UAT2/marketplace  
Snapshots:  
2022-03-21T21:03:55Z 0.00B [ERROR: mongodump: read data: make dump: archive writer: error writing data for collection `OMS_AUDIT.MessageCollection` to disk: error reading collection: (CursorNotFound) cursor id 251611301277 not found / Mux ending but selectCases still open 2.] [2022-03-21T21:08:18]  
2022-03-20T00:04:04Z 0.00B [ERROR: mongodump: read data: make dump: archive writer: error writing data for collection `OMS_AUDIT.MessageCollection` to disk: error reading collection: (CursorNotFound) cursor id 249920647910 not found / Mux ending but selectCases still open 2.] [2022-03-20T00:08:16]  
2022-03-20T00:03:08Z 0.00B [ERROR: mongodump: read data: make dump: archive writer: error writing data for collection `PURCHASE_HISTORY.order` to disk: error reading collection: (CursorNotFound) cursor id 501869031395 not found / Mux ending but selectCases still open 2.] [2022-03-20T00:03:16]  
2022-03-19T23:40:47Z 0.00B [ERROR: mongodump: read data: make dump: archive writer: error writing data for collection `PURCHASE_HISTORY.order` to disk: error reading collection: (CursorNotFound) cursor id 499505297296 not found / Mux ending but selectCases still open 2.] [2022-03-19T23:43:16]  
2022-03-19T23:00:05Z 0.00B [ERROR: mongodump: read data: make dump: archive writer: error writing data for collection `OMS_AUDIT.MessageCollection` to disk: error reading collection: (CursorNotFound) cursor id 253644756457 not found / Mux ending but selectCases still open 2.] [2022-03-19T23:02:33]  
2022-03-16T22:54:25Z 19.96GB [complete: 2022-03-16T23:16:42]  
PITR chunks [4.55GB]:  
2022-03-16T23:16:43 - 2022-03-21T21:03:57

Thank you

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<div class="post-metadata">

**Author:** ![Ivan\_Groenewold](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/ivan_groenewold/32/6299_2.png) [@Ivan\_Groenewold](https://forums.percona.com/u/Ivan_Groenewold)\
**Post date:** [March 23, 2022, 11:40am UTC](https://forums.percona.com/t/cursor-not-found-error-during-percona-backup/14854/2 "2022-03-23T11:40:09Z")

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Hello, backing up MongoDB 3.6 is not supported. You will need 4.0 or higher version.

Regards